Valve device



Dec. 6, 1938. B, MOLLBERG 2,139,376

VALVE DEVI G E Filed May 20, 1936 In en ror 1 Patented Dec. 6, 1938 iPATENT OFFICE VALVE nnvrcn Byron Mollberg, St. Mo assignor to CarterCarburetor Corporation, St. Louis, Mo., a corporation of DelawareApplication May 20, 1930, Serial No. 80,738

lClaim.

This invention relates to valve devices and consists particularly innovel means for retaining a valve element, within its chamber.

An object of the invention is to provide novel check valve retainermeans which may be readily applied to a valve chamber positioned withrespect to adjacent structure so as to be accessible with difllculty.

Another object is to provide novel, simplified,

andinexpensive means for retaining in position the check valve in acarburetor accelerating pump l in which the valve and its chamber arerelatively small elements located at the bottom or closed end of thepump cylinder.

These objects and other more detailed objects hereafter appearing areattained substantially by the structure illustrated in the accompanyingdrawing, in which:

Figure 1 is a side view of an internal combustion engine carburetor,parts being broken away to illustrate the accelerating pump structure.

, Figure 2 is a view taken substantially at 90 degrees to Figure 1 andshowing the pump structure in section.

Figure 3 is a detail, horizontalsection'taken substantially on line 3-3of Figure 2.

The carburetor illustrated comprises a barrel I, enclosing the usualmixture passage and a throttle valve pivoted near the lower extremitythereof upon a shaft 2. Adjacent the barrel is a fuel bowl 3 having athreaded connection 4 for communication with a source of fuel. A manualcrank or lever (not shown) is provided for operating the throttle.Formed rigid with throttle shaft 2 is a crank 5 connected by means of alink i with an inverted L-shaped member I, which I extends through andis sealed from the interior of the fuelbowl by an enclosure casing 8.

Also located within the fuel bowl is a pump cylinder 9 enclosing apiston l connected to member I by a lost motion spring and piston roddevice l2. Located beneath piston l0 and slidable, therein is a smallercylinder H carrying a needle valve l3. Rotation of the throttle crank 45in a clockwise direction, incident to opening zle, are well known in theart, as are also other features of ,the carburetor shown, and since theydo not constitute the present invention, are not herein illustrated.

Rotation of throttle crank 5 counterclockwise, 5 incident to closing ofthe throttle valve, lifts piston l0 causing fuel to be drawn from thebowl 3 through passage I1 and pastintake ball check 18 into the pumpcylinder. Valve carrier l I drops during the intake stroke, cutting offthe outlet passage. Ball I8 is received within a re stricted aperture 19in the lower end wall of the pump cylinder and cooperates with a valveseat at the bottom of this aperture. Located at intervals around theside wall of the pump cylinder are a series of ribs 20 having inwardlyinclined or tapered upper surfaces and H slightly undercut lowerportions adjacent the cylinder end wall for receiving .a curved wirespring element 2| extending around the cylinder wall'and across apertureIQ for confining ball l8 therein. Spring 2| may be convenientlyassembled with the pump structure by being forced downwardly againsttapered ribs 20, which movement compresses the circular spring soas to 5permit the same to pass the ribs and snap into the undercuts or recessesin the lower portions thereof. When so assembled, the retainer springwill be securely maintained in position by its inherent resilience andby the undercut ribs 20.

Obviously, the retainerspring may be otherwise shaped, if desired, andthe cooperating abutments on the cylinder walls constructed to conform.The illustrated structure may be modifled in this and other respects aswill occur, to

those skilled in the art without departing from i the spirit of theinvention and the exclusive use of all such modifications as come withinthe scope of the appended claim as contemplated.

I claim: In combination, a fluid pressure chamber of substantial depthand having a transverse end wall and side wall structure restrictingaccess to said end wall, a recess in said end wall of substantially lessarea than said endwall and forming a valve chamber, abutment structureadjacent said recess but outside the same, and resilient valve retainermeans lodged against said abutment structure and extending across themouth of said recess to secure a valve therein.

BYRON Moi-name.

